FilterUtils.filter only accepts filterValue of type string

[hainesrdacorp]

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Plunkr Case (Bug Reports)
https://stackblitz.com/edit/github-svm8kf

Current behavior
Cannot call FilterUtils.filter(...) and pass a filterValue of anything other than a string type.
Cannot use filterMatchMode 'in' because an array of values cannot be provided.

Expected behavior
FilterUtils.filter(...) will accept a filterValue of any type. FilterUtils.filter(...) will pass filterValue to appropriate filterMatchMode (in) to filter the set.

Minimal reproduction of the problem with instructions
const filtered = FilterUtils.filter(this.cars, ['make'], ['Audi', 'BMW'], 'in');

What is the motivation / use case for changing the behavior?
Using existing filtering for custom component to determine result of filters.
Use the same set of filters currently applied to a p-table => apply those filters to a custom component

Please tell us about your environment:
Windows, VS Code, npm, express

• Angular version: 8.0

• PrimeNG version: 8.1.1

• Browser: [all ]

• Language: [all | TypeScript X.X | ES6/7 | ES5]

[hainesrdacorp]

My current work-around is to create a custom filter and add it to the filter utils dictionary and call that instead. This is undesirable though because now I have to look at each filter individually and see if it is a 'contains' or an 'in' and do different logic depending. I have also created a custom filter already to handle between two numbers and I now have to create another custom filter to handle filter input in string format instead.

export const SpliceIn = (value, filter: string): boolean => { const arrayFilter = filter.split(','); return FilterUtils.in(value, arrayFilter); }
...
FilterUtils['spliceIn'] = SpliceIn;
const filtered = FilterUtils.filter(this.cars, ['make'], ['Audi', 'BMW'].toString(), 'spliceIn');